Yarn-feed traverse mechanism for knitting-machines.



H. JANSSBN & M. ZWIGKY.

YARN FEED TRAVERSE MECHANISM FOR KNITTING MACHINES.

APPLICATION FILED DEC. 22, 1911.

1,0799 1 5, Patented NOV. 25, 1913.

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H. JANSSEN & M. ZWIOKY. YARN EEED TRAVERSE MECHANISM EO KNITTING MACHINES,

- APPLICATION FILED 13210.22, 1911. 1,079,91 5. Patented Nov. 25, 1913.

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HENRY JANSSEN AND MELCHIOR ZWICKY, OF WYOMISSING BOROUGH, PENNSYL- VANIA, ASSIGNORS TO TEXTILE MACHINE WORKS, OF WYOMISSING, PENNSYL- VANIA, A CORPORATION OF PENNSYLVANIA.

YARN-FEED TRAVERSE MECHANISM FOR KNITTING-MACHINES.

Specification of Letters Patent.

Patented Nov. 25, 1913.

Application filed December 22, 1911. Serial No. 687,336.

, To all whom it may concern:

Be it known that we, HENRY J ANSSEN and MELCHIOR ZWICKY, both citizens of the United States, and residents of the borough of \Vyomissing, in the county of Berks and State of Pennsylvania, have invented certain new and useful Improvements in Yam- Feed Traverse Mechanism for Knitting-Machines, of which the following is a specification.

This invention relates to straight knitting machines of the so-called cotton type, and consists in certain improvements in the thread-carrier mechanism of such machines; the main object being to provide in asatisfactory manner for securlng and maintaining the requisite variation and nicety of operation of the carriers.

The invention is fully described in connection with the accompanying drawings, and the novel features are specifically pointed out in the claims.

Figure 1 is a rear view of a rt-ion of one end or head of a straight knitting machine having the present improvements applied thereto. Fig. 2 is a cross-section on the line 22 of Fig. 1, looking in the direction of the arrow. Fig. 3 is a cross-section on the line 3 3 of Fig. 1. Fig. 4 is a sectional view on the line 4-4 of Fig. 3; the screw and adjustable nut bushings being omitted. Fig. 5 is a longitudinal section of the screw-inclosing portions of one of the stop-nuts, v

The general construction and operation of the type of knitting machine to which our and arranged, as indicated, to contact with the ends of said rods to stop their movement.

in one direction, or with stop lugs ll proa series 0 to swin vided thereon as required, to limit their movement in the reverse direction.

In our improved construction two separate stop nuts, 15 and 16, are provided on the screw 2; the nut 15 carr ing stopping devices for one direction of the carrier rod movement, and the nut- 16 for the reverse direction, so that the pressure and force of impact in stopping such rods is exerted upon each nut in one direction only, thereby avoiding the wear and inaccuracy of stoppage incident to exerting reverse strains upon a single nut.

The stop device of nut 16 is abell-crank stop-lever 20, which is pivoted upon the guide rod 3 andengaged by arms 21, 21 of the nut so as to be carried to-and-fro with the latter; the stop arm 22 of said lever being adapted to seat in the carrier-rod recess 23 of the rod-supporting extension 24 of said nut, when in operative position; and being either automatically raised as required by means of a reciprocating controller bar 25 arranged to engage its other arm 26, or

fixedly supported in raised position by means of a suitable raising lever 27 when it is not in service. slide's upon the parallel guide rod 3 and also has a rod-supportin extension 30,'is provided with rearw'ar ly and upwardly extending pivot ears 31, 31, between which are pivotall mounted upon a pivot pin 32, stop levers 33, 33, arranged in the plane of corresponding carrier rods 10. When lowered to operative position the ends of each of these stop levers rests upon the rod a supporting extension 30 of the nut, directly in the path of a carrier-rod 10; said end being preferably provided, as shown, with an adjustable contact point 36 to permit of accurately determining the'stopping position of the rod. When raised to inoperative position each lever permits the corresponding rod 10 to be moved len hwise' under it to any required distance (Fig. 4), as when temporarily thrown out of service; its stop lever 33 being allowed to rest upon the projected rod so as to fall into operative osition when the latter is again thrown into service.

' The action of the carrier rods 10 in striking the stopping devices, tends particularly The nut 15, which also veniently and effectively taking up this wear so as to readily secure the desired accuracy and smoothness of operation.

To this end each of the sto nuts 15, 16 comprises, as shown, a split cylindrical shell portion, to which are fitted a pair of split bushings 40 and 41, which are internally.

threaded to suit the screw 2. Each bushing is formed with a flange 42 which is secured to an end of the nut shell by a screw 43 or 44. The screw 44 passes through a circular slot 45 in one of these flanges, thus permitting the bushingto be independently ad.- justed upon the screw 2 so as to take up any endwise wear, and to .be then tightly resecured to the shell by tightening up the screw. The split bushings of each nut may also be closed slightly upon the screw 2 as may be required, by means of the clamping bolts 48 of the split shell; thus readily re 7 storing substantially the original conditions of fit and adjustment.

What we claim is 1. In a straight knitting machine having aseries of reciprocating thread-carrier rods and a controlling screw therefor an endstop nut on said screw provided with spaced pivot-pin ears carrying a transverse pivot pin arranged above the plane of said series of rods, and a corresponding series of endstop levers for said rods pivotally mounted upon said transverse pin so as to independently swing thereon to operative or inoperative positions.

2. In a straight knitting machine the combination with the thread-carrier rods and controlling screw therefor, of an endstop nut provided with pivot ears, and a series of pivotally mounted end-stop levers for said rods arranged to swing in the plane of the respective rods and to permit free passage of determined rods when the corresponding levers are swung to inoperative positions; said levers being provided with separately adjustable rod-contacting points.

3. In a straight knitting machine the combination with a series of reciprocating thread-carrier rods and a controlling screw therefor, of a split end-stop nut on said screw carrying a corresponding series of end-stop levers for said rods, and a separate split stop nut thereon, arranged to stop the reverse movements of said-- rods; said nuts being independently adjustable son said' HENRY JANSSEN.

MELCHIOR ZWICKY.

Witnesses:

ROB. CARL RAHM, D. M. STEWART. 

